摘要：
Network of Schools Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 22729 Accepted: 8926 Description A number of schools are connected to a 阅读全文
摘要：
Popular Cows Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 39115 Accepted: 15937 Description Every cow's dream is to become the most popu 阅读全文